{
  "paper": {
    "school": "Tao Nan",
    "year": 2024,
    "level": "P5",
    "label": "Weighted Assessment 1",
    "source_prefix": "Tao Nan 2024 P5 Weighted Assessment 1",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "Write 7 104 396 in words.",
      "answer0": "Seven million, one hundred and four thousand, three hundred and ninety-six",
      "answer1": "Seven million, one hundred and four thousand, three hundred and sixty-nine",
      "answer2": "Seven million, fourteen thousand, three hundred and ninety-six",
      "answer3": "Seven million, one hundred and forty thousand, three hundred and ninety-six",
      "correct_answer": 0,
      "skill_id": 149,
      "difficulty_id": 1,
      "explanation": "7 104 396 read by periods: 7 (million), 104 (thousand), 396. In words: seven million, one hundred and four thousand, three hundred and ninety-six.",
      "hints": ["Group the digits into periods of three from the right: 7 | 104 | 396.", "Name each group followed by its place value (million, thousand)."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q1",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Word answer -> MCQ per spec (text fill-ins fragile)."
    },
    {
      "n": 2,
      "type_id": 2,
      "question": "Find the value of \\(32 - 24 \\div (2 + 6)\\).<br>[?]",
      "answer0": "29",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 155,
      "difficulty_id": 1,
      "explanation": "Brackets first: 2 + 6 = 8. Then divide: 24 ÷ 8 = 3. Then subtract: 32 − 3 = 29.",
      "hints": ["Work out the bracket first.", "Do division before subtraction (order of operations)."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 32 - 24 ÷ 8 = 32 - 3 = 29."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Find the value of \\(3\\dfrac{2}{3} + 1\\dfrac{5}{12} - 2\\dfrac{1}{4}\\). Give your answer as a mixed number in the simplest form.",
      "answer0": "\\(2\\dfrac{5}{6}\\)",
      "answer1": "\\(2\\dfrac{10}{12}\\)",
      "answer2": "\\(3\\dfrac{1}{6}\\)",
      "answer3": "\\(2\\dfrac{1}{2}\\)",
      "correct_answer": 0,
      "skill_id": 160,
      "difficulty_id": 2,
      "explanation": "Convert to twelfths: 3 8/12 + 1 5/12 - 2 3/12 = 4 13/12 - 2 3/12 = 2 10/12 = 2 5/6.",
      "hints": ["Make the denominators the same (use 12).", "Add the first two mixed numbers, then subtract; simplify the final fraction."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Mixed-number answer -> MCQ per spec. Key: 3 8/12 + 1 5/12 - 2 3/12 = 2 10/12 = 2 5/6."
    },
    {
      "n": 4,
      "type_id": 2,
      "question": "3 h 18 min = [?] min",
      "answer0": "198",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 91,
      "difficulty_id": 1,
      "explanation": "3 h = 3 × 60 = 180 min. 180 + 18 = 198 min.",
      "hints": ["1 hour = 60 minutes.", "Multiply the hours by 60, then add the extra minutes."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 180 min + 18 = 198 min."
    },
    {
      "n": 5,
      "type_id": 0,
      "question": "Complete the symmetric figure with AB as the line of symmetry.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 145,
      "difficulty_id": 2,
      "explanation": "Reflect each segment of the given figure across the diagonal line AB to complete the symmetric figure on a grid.",
      "hints": ["Reflect every point the same distance on the other side of line AB.", "Use the grid squares to count the distance from the line."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q5",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 4,
      "image_bbox": [0.15, 0.41, 0.55, 0.68],
      "notes": "Draw/complete-figure task -> type_id 0 (interactive, not servable). Answer key shows the completed mirrored grid figure."
    },
    {
      "n": 6,
      "type_id": 0,
      "question": "Draw a line perpendicular to line AB that passes through point O. Mark the right angle.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 100,
      "difficulty_id": 1,
      "explanation": "Draw a line through O that meets AB at 90° and mark the right angle at the intersection.",
      "hints": ["A perpendicular line meets AB at a right angle (90°).", "Use a set square so the new line passes through point O."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q6",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 5,
      "image_bbox": [0.30, 0.24, 0.78, 0.40],
      "notes": "Draw task -> type_id 0 (interactive, not servable)."
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "Mrs Lim needs 400 pens as Children's Day gifts. A bookshop sells 7 pens in each packet. How many packets of pens does she need to buy?<br>[?]",
      "answer0": "58",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 152,
      "difficulty_id": 2,
      "explanation": "400 ÷ 7 = 57 remainder 1. The leftover pen still needs a packet, so round up: 57 + 1 = 58 packets.",
      "hints": ["Divide 400 by 7 to see how many full packets give.", "There is a remainder, so she needs one more packet to cover it."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 400 ÷ 7 = 57R1, 57 + 1 = 58."
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "An odd number when rounded to the nearest thousand is 64 000. What is the smallest possible value of this number?<br>[?]",
      "answer0": "63501",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 150,
      "difficulty_id": 2,
      "explanation": "Numbers rounding to 64 000 range from 63 500 to 64 499. The smallest is 63 500, but it must be odd, so the smallest odd value is 63 501.",
      "hints": ["Which numbers round up/down to 64 000? Start from 63 500.", "63 500 is even — take the next number that is odd."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 63501 ≈ 64000."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "Find the value of \\(26 \\div 4\\). Express your answer as a decimal.<br>[?]",
      "answer0": "6.5",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 125,
      "difficulty_id": 1,
      "explanation": "26 ÷ 4 = 6 remainder 2 = 6 2/4 = 6 1/2 = 6.5.",
      "hints": ["26 ÷ 4 is not a whole number; find the remainder.", "Write the remainder as a fraction, then convert to a decimal."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 26 ÷ 4 = 6 2/4 = 6 1/2 = 6.5. Decimal answer -> FIB."
    },
    {
      "n": 10,
      "type_id": 2,
      "question": "The line graph shows the number of packets of milk sold in a school canteen each day in a particular week. How many packets of milk are sold in that week?<br>[?]",
      "answer0": "155",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 148,
      "difficulty_id": 1,
      "explanation": "Read each day's value: Mon 30, Tue 40, Wed 15, Thu 45, Fri 25. Total = 30 + 40 + 15 + 45 + 25 = 155 packets.",
      "hints": ["Read the value at each point on the line graph.", "Add the five daily amounts together."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 7,
      "image_bbox": [0.13, 0.20, 0.92, 0.46],
      "notes": "Answer key: 30 + 40 + 15 + 45 + 25 = 155. Line graph figure required."
    },
    {
      "n": 11,
      "type_id": 1,
      "question": "The diagram shows the direction of each item from Ryan's desk. Ryan is at his desk. He turned 225° clockwise and faced the whiteboard. Where was he facing at first?",
      "answer0": "Back Door",
      "answer1": "Dustbin",
      "answer2": "Noticeboard",
      "answer3": "Bookshelf",
      "correct_answer": 0,
      "skill_id": 142,
      "difficulty_id": 2,
      "explanation": "The whiteboard is North of the desk. Turning 225° clockwise to face North means he started 225° anticlockwise from North, i.e. facing South-East — the Back Door.",
      "hints": ["The whiteboard is directly North of the desk.", "Undo a 225° clockwise turn by going 225° the other way from North."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q11",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 8,
      "image_bbox": [0.06, 0.25, 0.90, 0.58],
      "notes": "Original parts a/b/c (Dustbin / Back door / Noticeboard). Direction answers -> MCQ. This card uses part (b); answer Back Door. Compass diagram figure required."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "The graph shows the number of four types of chocolate bars sold in a supermarket. The number of dark chocolate bars sold is \\(\\dfrac{1}{3}\\) of the milk chocolate bars. Each bar of chocolate was sold at $2. How much did the supermarket earn from the sale of the chocolate bars?<br>$[?]",
      "answer0": "460",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 148,
      "difficulty_id": 2,
      "explanation": "From the graph: Milk 60, Fruit 50, Nuts 100. Dark = 1/3 of milk = 60 ÷ 3 = 20. Total bars = 60 + 50 + 100 + 20 = 230. Earnings = 230 × $2 = $460.",
      "hints": ["Read Milk, Fruit and Nuts from the bars; work out Dark as 1/3 of Milk.", "Add all four amounts, then multiply by $2."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q12",
      "image_needed": true,
      "image_options": false,
      "image_file": null,
      "image_page": 9,
      "image_bbox": [0.22, 0.15, 0.92, 0.42],
      "notes": "Original part (a) 'draw the dark bar' is a draw task (skipped). This card serves part (b): total $460 = 230 bars × $2. Bar graph figure required. Answer is whole dollars -> FIB."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Ali spent 25 min on a Math project and \\(\\dfrac{2}{3}\\) h on his Science project.<br>(a) How much time did he spend on both projects? [?] min<br>(b) He started working on his projects at 3.30 p.m. In between the two projects, he took a 15 min break. What time did he finish both projects? Give your answer using the 24-h clock. [?]",
      "answer0": "65",
      "answer1": "1650",
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 165,
      "difficulty_id": 2,
      "explanation": "(a) 2/3 h = 2/3 × 60 = 40 min. Total = 25 + 40 = 65 min. (b) Start 3.30 p.m. = 1530. Add 65 min work + 15 min break = 80 min. 1530 + 80 min = 1650, i.e. 4.50 p.m. = 1650.",
      "hints": ["2/3 of an hour = 2/3 × 60 minutes.", "For (b) add the total working time plus the 15 min break to 1530 (24-h clock)."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q13",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: (a) 40 + 25 = 65 min; (b) 1530 + 80 min = 1650. Part (b) 24-h clock time as 4-digit integer."
    },
    {
      "n": 14,
      "type_id": 1,
      "question": "\\(\\dfrac{1}{5}\\) of the audience at a concert are boys. \\(\\dfrac{3}{8}\\) of the remainder are girls. The rest are adults. There are 35 men and 45 women. Express the number of boys as a fraction of the number of girls at the concert. Leave your answer in the simplest form.",
      "answer0": "\\(\\dfrac{2}{3}\\)",
      "answer1": "\\(\\dfrac{1}{5}\\)",
      "answer2": "\\(\\dfrac{3}{8}\\)",
      "answer3": "\\(\\dfrac{3}{2}\\)",
      "correct_answer": 0,
      "skill_id": 159,
      "difficulty_id": 2,
      "explanation": "Boys = 1/5 of total. Remainder = 4/5. Girls = 3/8 of remainder = 3/8 × 4/5 = 12/40 = 3/10 of total. Boys : Girls = 1/5 : 3/10 = 2/10 : 3/10 = 2 : 3, so boys are 2/3 of girls.",
      "hints": ["Find girls as a fraction of the whole: 3/8 of the 4/5 remainder.", "Compare boys (1/5) with girls and simplify the fraction."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Part (a) only — fraction answer 2/3 -> MCQ. Part (b) total 160 handled separately below."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "There were 4 times as many butter muffins as chocolate muffins on sale in a shop. After 100 butter muffins and 35 chocolate muffins were sold, the number of butter muffins left became 5 times the number of chocolate muffins left. How many butter muffins were there at first?<br>[?]",
      "answer0": "300",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 152,
      "difficulty_id": 3,
      "explanation": "Let chocolate = 1 unit, butter = 4 units. After selling: butter left = 4u − 100, chocolate left = 1u − 35. Given 4u − 100 = 5(1u − 35) = 5u − 175, so 175 − 100 = 5u − 4u, u = 75... using the key's method: 1 unit = 35 × 4 − 100 = 40; butter at first = 4 units = wait. Key working: 5 units + 100 = 5×40 + 100 = 300. Butter muffins at first = 300.",
      "hints": ["Draw model: butter = 4 units, chocolate = 1 unit.", "Set butter-left = 5 × chocolate-left after the sales, then solve for 1 unit."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key working: '1 unit = 35 x 4 - 100 = 40; 5 units + 100; 5 x 40 + 100 = 200 + 100 = 300'. Final answer 300 butter muffins."
    },
    {
      "n": 16,
      "type_id": 2,
      "question": "At a concert, \\(\\dfrac{1}{5}\\) of the audience are boys. \\(\\dfrac{3}{8}\\) of the remainder are girls. The rest are adults. There are 35 men and 45 women. What is the total number of people at the concert?<br>[?]",
      "answer0": "160",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 165,
      "difficulty_id": 3,
      "explanation": "Adults = 35 men + 45 women = 80. Boys = 1/5 of total; girls = 3/8 of remainder = 3/10 of total; adults = total − boys − girls. Boys+girls = 1/5 + 3/10 = 5/10 = 1/2, so adults = 1/2 of total. Half the total = 80, so total = 160 people.",
      "hints": ["Boys are 1/5 and girls are 3/10 of the whole — add these.", "The adults (35 + 45 = 80) make up the rest; use that to find the total."],
      "source": "Tao Nan 2024 P5 Weighted Assessment 1 Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "This is Q14 part (b). Answer key: 5 units = 35 + 45 = 80; 10 units = 80 × 2 = 160 total people. Whole-number answer -> FIB. Stem repeats Q14 context (de-cross-referenced)."
    }
  ]
}